Finding the Fourth Proportional to 1,290,665.67, 1,781,161.82 and 709,913.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290,665.67 : 1,781,161.82 = 709,913.35 : x
2. Step 2: Convert to fraction form
   1,290,665.67/1,781,161.82 = 709,913.35/x
3. Step 3: Cross multiply
   1,290,665.67x = 1,781,161.82 × 709,913.35
4. Step 4: Simplify right side
   1,290,665.67x = 1,264,470,554,528.30
5. Step 5: Solve for x
   x = 1,264,470,554,528.30/1,290,665.67
6. Step 6: Final answer
   x = 979,704.18